package com.itheima.utils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.context.SecurityContextImpl;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.stereotype.Component;

import java.util.Collection;


@Component
public class SecurityUtil {
    private Logger logger = LoggerFactory.getLogger(SecurityUtil.class);

     @Autowired
     @Qualifier("myUserDetailsService")
     private UserDetailsService userDetailsService;
 
    public void logInAs(String username) {
     UserDetails user = userDetailsService.loadUserByUsername(username);

     if (user == null) {
         throw new IllegalStateException("User " + username + " doesn't exist, please provide a valid user");
     }
     logger.info("> Logged in as: " + username);

     SecurityContextHolder.setContext(
             new SecurityContextImpl(
                     new Authentication() {
                         @Override
                         public Collection<? extends GrantedAuthority> getAuthorities() {
                             return user.getAuthorities();
                         }
                         @Override
                         public Object getCredentials() {
                             return user.getPassword();
                         }
                         @Override
                         public Object getDetails() {
                             return user;
                         }
                         @Override
                         public Object getPrincipal() {
                             return user;
                         }
                         @Override
                         public boolean isAuthenticated() {
                             return true;
                         }
                         @Override
                         public void setAuthenticated(boolean isAuthenticated) throws IllegalArgumentException { }
                         @Override
                         public String getName() {
                             return user.getUsername();
                         }
     }));
     org.activiti.engine.impl.identity.Authentication.setAuthenticatedUserId(username);
 }
  }